快速硫化型丁腈橡胶的制备及性能研究

doi:10.3976/j.issn.1002-4026.20240135

Abstract

Abstract:

Herein, a wet-mixing process was used to improve the dispersion of fillers in nitrile latex by incorporating three types of accelerators: trialkyl chlorides (TACs), tetramethylthiuram disulfide (TMTD), and zinc dibenzyldithiocarbamate (ZTC). These accelerators were added to cost-effective and readily available nitrile latex, followed by mixing, coagulation, washing, and drying to obtain nitrile rubber nitrile butadiene rubber (NBR). A novel rapidly-vulcanized NBR was developed using the properties of NBR3445F and NBR3345 as reference standards, and the effects of different types and dosages of accelerators on the vulcanization characteristics, mechanical properties, and microstructure of the developed NBR were studied. Results showed that compared with conventional rapidly vulcanized NBR, the developed NBR with 2 parts of accelerator TAC (TAC-2) exhibited 4.7 s higher vulcanization speed, a 138% higher tensile strength, and 59% higher tear strength. This NBR also exhibited substantially higher overall performance than NBRs with the other two accelerators, ZTC and TMTD. These findings were well aligned with the microstructural characteristics observed in scanning electron microscopy image. Based on the premise of ensuring rapid vulcanization speed and safe processing performance, TAC, an accelerator with better performance, can be selected to manufacture a rapidly vulcanized NBR, providing a technical path and an experimental basis for the development of related materials.

Key words: rapid vulcanization, wet mixing, accelerator, butadiene nitrile latex, nitrile rubber

CLC Number:

TQ333.7

LI Yutong, CHEN Dongping, LI Tiezhu, WANG Fushan, LI Lin, WANG Hui. Research on preparation and properties of rapidly vulcanized nitrile rubber[J].Shandong Science, 2025, 38(6): 86-93.

Figures/Tables 5

Table 1

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Table 2

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References 34

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编号	门尼黏度
NBR3345	37.4
NBR3445F	36.6
TAC-5	78.5
TAC-2	84.3
TMTD-5	71.7
TMTD-2	71.9
ZTC-5	76.6
ZTC-2	37.4

编号	M_H/(N·m)	M_L/(N·m)	ΔM/(N·m)	t₁₀/min	t₉₀/min
NBR3345	5.87	0.53	5.34	3.20	7.68
NBR3445F	7.49	0.46	7.03	2.06	5.56
TAC-5	6.63	1.03	5.60	1.13	3.02
TAC-2	6.68	1.13	5.55	1.29	3.45
TMTD-5	6.85	1.05	5.80	1.26	3.73
TMTD-2	7.98	1.21	6.77	1.42	3.89
ZTC-5	6.29	0.93	5.36	1.23	3.05
ZTC-2	5.78	1.07	4.71	1.61	3.52

Research on preparation and properties of rapidly vulcanized nitrile rubber

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